add return value for downloadupdate

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-update",
-  "version": "10.15.3",
+  "version": "10.16.0",
   "description": "react-native hot update",
   "main": "src/index",
   "scripts": {
@@ -69,7 +69,7 @@
     "fs-extra": "^11.2.0",
     "jest": "^29.7.0",
     "pod-install": "^0.2.2",
-    "prettier": "^3",
+    "prettier": "^2",
     "react": "18.2.0",
     "react-native": "0.73",
     "ts-jest": "^29.2.5",